Senior firmware engineer interview questions shared by candidates
There's not a particular question that's most difficult. I'd recommend being pretty up on RTOS and recent embedded microcontrollers. In my case I feel I am rather up on C, C++, board design and bringup, hw tools, author-level linker and debugger tech, fair RTOS understanding at a kernel level, register-level ARM and AVR understanding, and decades of UNIX experience, and those didn't get me to "yes", despite all those fitting the job description. So you might wish to set expectations that a whole constellation of judgement may be at play and a good technical show may be just half of the requirements. I really don't know why I wasn't selected, unfortunately, so my guess is in a market like SF or Seattle one gets a pretty sweet pool from which to choose.
Given an NDA, I can't reveal the questions. I can tell you that my coding challenge and some of my tech questions have been posted. The key is know your knowledge of firmware development. The coding challenge absolutely requires firmware coding styles. The technical interviews are about understanding problem solving. Interact with your interviewers and you should be fine.
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